ABSTRACT
Selection and masking operators are used for quite different purposes, but the
toolsets used in each are derivatives of Selection and Mask tools previously
discussed within the Paint operator. Selections are used when you want other
operators and effects only to occur on part of an image. Masks are used when
you only want part of an image to be visible, while other portions are made
partially or completely transparent to allow the images or pixels below/behind
to be visible.
